Lesson
elements-attributes
This lesson teaches Elements and attributes—the ideas, syntax, and habits you need before moving on in XML.
Without a solid grasp of Elements and attributes, you will repeat mistakes in XML exercises and on real pages or scripts.
You will apply Elements and attributes in contexts like: Enterprise integration, publishing pipelines, Android resources, and data exchange alongside JSON.
Edit XML in the playground, watch well-formedness feedback, preview rendered output, then complete the quizzes.
When the previous lesson's MCQs feel easy and you can explain Elements and attributes in your own words.
Put identity and metadata in attributes when values are short and apply to the whole element. Put content in child elements when it may grow or contain markup.
Rule of thumb: if it might contain nested structure, use an element — not an attribute.
Challenge
<catalog> with two <book id="..."> children.<title> and <price>.Done when: validator shows well-formed XML and tree preview lists books.
Can you explain this lesson in 30 seconds without reading notes?
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